import cadquery as cq
w0=cq.Workplane('YZ',origin=(-20,0,0))
r=w0.sketch().segment((-50,-16),(-43,-19)).segment((-43,-35)).segment((-9,-35)).segment((2,-39)).segment((4,-35)).segment((19,-35)).segment((19,0)).segment((26,16)).segment((19,19)).segment((19,35)).segment((-15,35)).segment((-25,39)).segment((-27,35)).segment((-43,35)).segment((-43,15)).segment((-41,15)).segment((-43,8)).segment((-43,0)).close().assemble().finalize().extrude(-19).union(w0.sketch().push([(32,13)]).circle(18).reset().face(w0.sketch().segment((19,18),(26,0)).segment((44,7)).segment((37,25)).close().assemble(),mode='s').finalize().extrude(59))